National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast with Haze

80°F

27°C

Humidity 85%
Wind Speed SW 6 mph
Barometer 29.69 in (1004.5 mb)
Dewpoint 75°F (24°C)
Visibility 3.00 mi
Heat Index85°F (29°C)
Last update 8 May 10:56 am CDT
Extended Forecast for

San Marcos TX

  • Today

    Today: Partly sunny, with a high near 92. Heat index values as high as 103. South wind around 10 mph.

    High: 92 °F

    Partly Sunny

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, increasing clouds, with a low around 72. South southeast wind 5 to 10 mph.

    Low: 72 °F

    Mostly Clear
    then Patchy
    Fog

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Patchy fog before 10am. Otherwise, partly sunny, with a high near 91. Heat index values as high as 102. East southeast wind 5 to 10 mph.

    High: 91 °F

    Patchy Fog
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 68. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 68 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 83. Northeast wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 83 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 64. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 64 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 80. East wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 80 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. East southeast wind around 10 mph.

    Low: 65 °F

    Chance
    T-storms

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 78. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 78 °F

    Showers
    Likely

Detailed Forecast

Today
Partly sunny, with a high near 92. Heat index values as high as 103. South wind around 10 mph.
Tonight
Patchy fog after 4am. Otherwise, increasing clouds, with a low around 72. South southeast wind 5 to 10 mph.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Patchy fog before 10am. Otherwise, partly sunny, with a high near 91. Heat index values as high as 102. East southeast wind 5 to 10 mph.
Thursday Night
Mostly cloudy, with a low around 68. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Friday
Partly sunny, with a high near 83. Northeast wind 15 to 20 mph, with gusts as high as 30 mph.
Friday Night
Mostly cloudy, with a low around 64. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 80. East wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. East southeast wind around 10 mph.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 78. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 66.
Monday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 64.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Click Map For Forecast
Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.9°N 97.91°W (Elev. 640 ft)
Last Update:
6:42 am CDT May 8, 2024
Forecast Valid:
11am CDT May 8, 2024-6pm CDT May 14, 2024
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation